package com.cml.springcloud.controller;

import com.cml.springcloud.entities.CommonResult;
import com.cml.springcloud.entities.Payment;
import com.cml.springcloud.loadbalancer.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author cml
 * @create 2021/4/17 9:46
 */
@RestController
@Slf4j
public class OrderController {
//    private static final String PAYMENT_URL = "http://localhost:8001";
    private static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;
    @Resource
    private DiscoveryClient discoveryClient;
    @Resource
    private LoadBalancer loadBalancer;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        log.info("*********创建payment:"+payment);
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(
                PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        log.info(entity.toString()+"\t"+entity.getStatusCode());
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }
        return new CommonResult<>(400,"失败");
    }

    @GetMapping("/consumer/payment/hello")
    public String hello(){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/hello",String.class);
    }

    @GetMapping("/consumer/payment/lb")
    public String lb(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances.size()<=0||instances==null){
            return null;
        }
        ServiceInstance instance = loadBalancer.getInstance(instances);
        URI uri = instance.getUri();
        System.out.println("******:"+uri);
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

    // ====================> zipkin+sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin()
    {
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/", String.class);
        return result;
    }
}
